/**
 * password_strength_plugin.js
 * Copyright (c) 2009 myPocket technologies (www.mypocket-technologies.com)

 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * View the GNU General Public License <http://www.gnu.org/licenses/>.

 * @author Darren Mason (djmason9@gmail.com)
 * @date 3/13/2009
 * @projectDescription Password Strength Meter is a jQuery plug-in provide you smart algorithm to detect a password strength. Based on Firas Kassem orginal plugin - http://phiras.wordpress.com/2007/04/08/password-strength-meter-a-jquery-plugin/
 * @version 1.0.1
 *
 * @requires jquery.js (tested with 1.3.2)
 * @param shortPass:	"shortPass",	//optional
 * @param badPass:		"badPass",		//optional
 * @param goodPass:		"goodPass",		//optional
 * @param strongPass:	"strongPass",	//optional
 * @param baseStyle:	"testresult",	//optional
 * @param userid:		"",				//required override
 * @param messageloc:	1				//before == 0 or after == 1
 *
*/

(function($){
	$.fn.shortPass = 'Password too short';
	$.fn.badPass = 'Password is weak';
	$.fn.goodPass = 'Password is okay';
	$.fn.strongPass = 'Password is strong';
	$.fn.samePassword = 'Password is weak';
	$.fn.fieldsDontMatch ='Passwords do not match';
	$.fn.fieldsMatch ='Passwords match';
	$.fn.hideMatch ="";
	$.fn.hideStrength="";
	$.fn.resultStyle = "";
	$.fn.matchResultStyle ="";

	 $.fn.passStrength = function(options) {

		 var defaults = {
				shortPass: 		"shortPass",	//optional
				badPass:		"badPass",		//optional
				goodPass:		"goodPass",		//optional
				strongPass:		"strongPass",	//optional
			  fieldsMatch: "fieldsMatch", //if two fields match
			  fieldsDontMatch: "fieldsDontMatch",//if two fields dont match
				baseStyle:		"strengthResult",	//optional
			  matchStyle:   "matchResult",
			  hideMatch:		"hideMatch",
			 	hideStrength: "hideStrength",
				userid:			"",				//required override
			 	confirmPassword: "",						//this field is if you want to match the content of two inputs
				messageloc:		1				//before == 0 or after == 1
			};
		 	var opts = $.extend(defaults, options);

		 	return this.each(function() {
		 		var obj = $(this);

/*				 $(opts.confirmPassword).unbind().keyup(function(){
					var result=$.fn.testEquivalence($(obj).val(),$(opts.confirmPassword).val(),opts);
					if(opts.messageloc === 1)
					{
						$(opts.confirmPassword).next("." + opts.matchStyle).remove();
						$(opts.confirmPassword).after("<span class=\""+opts.matchStyle+"\"><span></span></span>");
						$(opts.confirmPassword).next("." + opts.matchStyle).addClass($(opts.confirmPassword).matchResultStyle).find("span").text(result);
					}
					else
					{
						$(opts.confirmPassword).prev("." + opts.matchStyle).remove();
						$(opts.confirmPassword).before("<span class=\""+opts.matchStyle+"\"><span></span></span>");
						$(opts.confirmPassword).prev("." + opts.matchStyle).addClass($(opts.confirmPassword).matchResultStyle).find("span").text(result);
					}
				 });*/

				 $(obj).unbind().keyup(function(){

					 var results=$.fn.teststrength($(this).val(),$(opts.userid).val(),opts);
					// var result =$.fn.testEquivalence($(this).val(),$(opts.confirmPassword).val(),opts);

					if(opts.messageloc === 1)
					{
						$(this).next("." + opts.baseStyle).remove();
						$(this).after("<span class=\""+opts.baseStyle+"\"><span></span></span>");
						$(this).next("." + opts.baseStyle).addClass($(this).resultStyle).find("span").text(results);

						//$(opts.confirmPassword).next("." + opts.matchStyle).remove();
						//$(opts.confirmPassword).after("<span class=\""+opts.matchStyle+"\"><span></span></span>");
						//$(opts.confirmPassword).next("." + opts.matchStyle).addClass($(opts.confirmPassword).matchResultStyle).find("span").text(result);
					}
					else
					{
						$(this).prev("." + opts.baseStyle).remove();
						$(this).before("<span class=\""+opts.baseStyle+"\"><span></span></span>");
						$(this).prev("." + opts.baseStyle).addClass($(this).resultStyle).find("span").text(results);
						
						//$(opts.confirmPassword).prev("." + opts.matchStyle).remove();
						//$(opts.confirmPassword).before("<span class=\""+opts.matchStyle+"\"><span></span></span>");
						//$(opts.confirmPassword).prev("." + opts.matchStyle).addClass($(opts.confirmPassword).matchResultStyle).find("span").text(result);
					}
		 		});

		 		//FUNCTIONS
				 $.fn.testEquivalence = function(field1,field2,option){
					if(field1=='' || field2==''){
						this.matchResultStyle =  option.hideMatch;return $(this).hideMatch;
					}
					if(field1.toLowerCase()==field2.toLowerCase()){
						this.matchResultStyle =  option.fieldsMatch;return $(this).fieldsMatch;
					}else{
						this.matchResultStyle =  option.fieldsDontMatch;return $(this).fieldsDontMatch;
					}
				};

		 		$.fn.teststrength = function(password,username,option){
		 			 	var score = 0;

					 		//password empty
						  if(password==""){this.resultStyle =  option.hideStrength;return $(this).hideStrength;}
					 
		 			    //password < 6
		 			    if (password.length < 6 ) { this.resultStyle =  option.shortPass;return $(this).shortPass; }

		 			    //password == user name
		 			    if (password.toLowerCase()==username.toLowerCase()){this.resultStyle = option.badPass;return $(this).samePassword;}

		 			    //password length
		 			    score += password.length * 4;
		 			    score += ( $.fn.checkRepetition(1,password).length - password.length ) * 1;
		 			    score += ( $.fn.checkRepetition(2,password).length - password.length ) * 1;
		 			    score += ( $.fn.checkRepetition(3,password).length - password.length ) * 1;
		 			    score += ( $.fn.checkRepetition(4,password).length - password.length ) * 1;

		 			    //password has 3 numbers
		 			    if (password.match(/(.*[0-9].*[0-9].*[0-9])/)){ score += 5;}

		 			    //password has 2 symbols
		 			    if (password.match(/(.*[!,@,#,$,%,^,&,*,?,_,~].*[!,@,#,$,%,^,&,*,?,_,~])/)){ score += 5 ;}

		 			    //password has Upper and Lower chars
		 			    if (password.match(/([a-z].*[A-Z])|([A-Z].*[a-z])/)){  score += 10;}

		 			    //password has number and chars
		 			    if (password.match(/([a-zA-Z])/) && password.match(/([0-9])/)){  score += 15;}
		 			    //
		 			    //password has number and symbol
		 			    if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([0-9])/)){  score += 15;}

		 			    //password has char and symbol
		 			    if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([a-zA-Z])/)){score += 15;}

		 			    //password is just a numbers or chars
		 			    if (password.match(/^\w+$/) || password.match(/^\d+$/) ){ score -= 10;}

		 			    //verifying 0 < score < 100
		 			    if ( score < 0 ){score = 0;}
		 			    if ( score > 100 ){  score = 100;}

		 			    if (score < 34 ){ this.resultStyle = option.badPass; return $(this).badPass;}
		 			    if (score < 68 ){ this.resultStyle = option.goodPass;return $(this).goodPass;}

		 			   this.resultStyle= option.strongPass;
		 			    return $(this).strongPass;

		 		};
		  });
	 };
})(jQuery);


$.fn.checkRepetition = function(pLen,str) {
 	var res = "";
     for (var i=0; i<str.length ; i++ )
     {
         var repeated=true;

         for (var j=0;j < pLen && (j+i+pLen) < str.length;j++){
             repeated=repeated && (str.charAt(j+i)==str.charAt(j+i+pLen));
             }
         if (j<pLen){repeated=false;}
         if (repeated) {
             i+=pLen-1;
             repeated=false;
         }
         else {
             res+=str.charAt(i);
         }
     }
     return res;
	};
